211345031 has 2 divisors, whose sum is σ = 211345032. Its totient is φ = 211345030.

The previous prime is 211345019. The next prime is 211345033. The reversal of 211345031 is 130543112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211345031 - 2⁶ = 211344967 is a prime.

It is a super-2 number, since 2×211345031² = 89333444256781922, which contains 22 as substring.

Together with 211345033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211344994 and 211345012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211345033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105672515 + 105672516.

It is an arithmetic number, because the mean of its divisors is an integer number (105672516).

Almost surely, 2^211345031 is an apocalyptic number.

211345031 is a deficient number, since it is larger than the sum of its proper divisors (1).

211345031 is an equidigital number, since it uses as much as digits as its factorization.

211345031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 211345031 is about 14537.7106519562. The cubic root of 211345031 is about 595.6585049898.

Adding to 211345031 its reverse (130543112), we get a palindrome (341888143).

The spelling of 211345031 in words is "two hundred eleven million, three hundred forty-five thousand, thirty-one".